Knox County Illinois is covered by a total of 21 ZIP Codes. There are 9 ZIP Codes in Knox County that extend into adjacent counties (Fulton County, Henry County, Mercer County, Peoria County, Stark County, and Warren County). Of the ZIP codes within or partially within Knox County there are 19 Standard ZIP Codes and 2 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Knox County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Galesburg | Standard | |||
| Galesburg | PO Box | |||
| Abingdon | Standard | |||
| Altona | Standard | |||
| Dahinda | Standard | |||
| East Galesburg | Standard | |||
| Galva | Standard | |||
| Gilson | Standard | |||
| Henderson | PO Box | |||
| Knoxville | Standard | |||
| La Fayette | Standard | |||
| Maquon | Standard | |||
| Oneida | Standard | |||
| Rio | Standard | |||
| Saint Augustine | Standard | |||
| Victoria | Standard | |||
| Wataga | Standard | |||
| Williamsfield | Standard | |||
| Elmwood | Standard | |||
| London Mills | Standard | |||
| Yates City | Standard |